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 *   Copyright (c) 2022 Huawei Device Co., Ltd.
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import JISDistributionAnalysis from './JISDistributionAnalysis';

class EUCJPDistributionAnalysis extends JISDistributionAnalysis {
  ////////////////////////////////////////////////////////////////
  // constants
  ////////////////////////////////////////////////////////////////
  public static   HIGHBYTE_BEGIN:number = 0xA1;
  public static   HIGHBYTE_END:number = 0xFE;
  public static   LOWBYTE_BEGIN:number = 0xA1;
  public static   LOWBYTE_END:number = 0xFE;

  ////////////////////////////////////////////////////////////////
  // methods
  ////////////////////////////////////////////////////////////////
  public constructor() {
    super();
  }

  protected getOrder(buf:ArrayBuffer,offset:number):number {
    const intArray =new Int8Array(buf)
    let highbyte:number = intArray[offset] & 0xFF;
    if (highbyte >=EUCJPDistributionAnalysis.HIGHBYTE_BEGIN) {
      let lowbyte:number = intArray[offset+1] & 0xFF;
      return (94 * (highbyte - EUCJPDistributionAnalysis.HIGHBYTE_BEGIN) + lowbyte - EUCJPDistributionAnalysis.LOWBYTE_BEGIN);
    } else {
      return -1;
    }
  }
}

export default EUCJPDistributionAnalysis